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(No Model.) v 6 Sheets-Sheet 1. A. H. PR'ENZEL. SHOE SEWING MACHINE.

No. 589,949. Patented Sept..14, 1897.

WITNESSES.-

ATTORNEYS.

(No Model.) 6 Sheets-Sheet 2.

' A. H. PRENZEL.

SHOE SEWING MACHINE.

Patented Sept. 14, 1897'.

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A. H. PRENZEL... SHOE SEWING MACHINE.

Patented Se t. 14,1897.

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A. H. PRENZEL.

SHOE SEWING MACHINE.

No. 589,949. Patented Sept. 14, 1897 IN V5 70/? 0562a: Jifreiczi,

WITNESSES:

Arm/mus.

(No Model.) 9 6 Sheets-Sheet 6., A. H. PRENZEL;

SHOE SEWING MACHINE.

No. 589,949. Patented Sept. 14, 1897.

l lllI ATTORNEYS.

FOURTIIS TO FRANKLIN P. ADAMS OF READING, PENNSYLVANIA.

, OF ADAMSDALE, AND KATIE V. ZUBER,

- SHOE-SEWING MACHINE.

' v SPECIFICATION forming part of Letters Patent No. 589,949, datedSeptember 14, 1897. Application filed December 2, 1895. Serial No.570,784. (No model.)

To all whom it may concern:

Be it known that I, ADAM I-I. PRENZEL, of Landingville, in the county ofSchuylkill and State ofPennsylvania, have invented a new and usefulImprovement in 'lurn-Shoe-Sewing Machines, of which the following is aspecification. 7

My invention is in the nature of a sewingmachine for stitching the solesupon thatclass IO, of shoes known as turns,in whicl1 the shoe ismadewrong side out and is then turned. It relates more especially to themachine for which Ihave already applied for Letters Patent byapplication, dated March 29, 1895, Serial No. 543,720.

My present invention comprehends certain features of improvement uponthat machine, which I briefly describe as follows; first, an improvedmeans for feeding the shoe past the needle as the latter is made tostitch the up: per to the sole; second, in improved means for bendingdown the outer edge of the sole to give more room for the curved needleto penetrate the channeled edge of the sole in stitching it to theupper.

Figure 1 is a View of the devices immedi ately operating upon the shoe,the latter be: ing shown in section. Fig. 2 is a plan view, on anenlarged scale, of a part of the shoe-sole with parts of the feedingdevices and needle shown in relation thereto, the parts being inposition for the forward or advance n1overnent of the shoe. Fig. 3 is aView similar to Fig. 2, but showing the position of parts during thebackward movement of the feed devices. Fig. 4 is a front elevation ofthe entire machine with parts in section. Fig. 5 is a plan view withparts in section. Fig. 6 is a side elevation taken from the right-handside of .Fig. 4:, being partly broken away and shown in section on line6 6. Fig 7 isa side elevation from the left-hand side of Fig. 4, beingpartly in section online 7 7 of Fig. 4.. Fig. 8 is a broken verticalsection taken on two planes, as shown by line 8 8 of Fig. 4E andlookingin the direction of the arrow on this line. Figs. 9 and 10 aredetails of modifications.

In the drawings, (see Fig. l,) X represents the main frame of themachine, consisting of a base-plate, a cross-head, and two verticalstandards carrying journal-bearings for a main shaft Y, arrangedhorizontally and driven by a pulley-Wheel Z.

On the main shaft Y are rigidly mounted three main cams A, B, and O. Thecam A actuates the feeding devices for feeding the work as the sewingprogresses and will be designated as the feed-cam. The cam 13 operatesthe needle and positive take-up and will be called the needle-cam, andthe cam O operates the breakdown device for bending down the edge ofthe, sole and giving'clearthe same, and also operates the looper forthrowing a loop of thread around the projecting and barbed end oftheneedle after it has passed through the work.

That the function and operation of 1ny.machine may be better understoodI will first describe the coaction of the direct instrumentalities whichoperate upon the shoe to effect the sewing and afterward describe themeans for actuating these instrumentalities.

Thus, referring to Fig. 1, s is the sole of a turned shoe, and to itsupper. The sole is channeled along its edge to form an overhanging lipc, of leather, which constitutes the at- {caching-point for the upper,and against the outer edge of which the edge of the upper and its lininglies to be attached by a row of stitching. The edge of the shoe ispressed against a rest r, and a breakdown bar b advances to I bend downthe edge act the sole, so as to give more room for the curved needle 72to enter. Then the needle passes through the edge of the upper and thechannel-lip c of the sole, as indicated in dotted lines. Then a looper Zthrows a loop of thread around the barbed end of the needle and theneedle, receding, draws the thread through the channel-lip c and upper,forming a stitch which firmly unites the two. i As so far described theoperation is the same as that described in my former application. Myimprovement relating to this part of the machine comprises a new feedingdevice and an improved arran tion of the breakdown bar.

The feeding devices of the present machine gement and acance for thepassage of the needle through comprise two parts 9 and f. In the oldmachine there was but one, and it acted with a reciprocating action tofeed the shoe sole along past the needle as the sewing progressed, andit had the combined functions of a feed and a channel guide. Thiscombination of functions in a single device I find will at times workbadly, for if the leather be soft or flanky the feed is not positivelyeffected.

In the present invention the part g (see Figs. 1, 2, and 3) forms thechannel-guide, and its end lies on the bottom of the channel against thesolid leather of the lip, while the part f forms the positive feed, andfor this purpose it has a different construction, different motion, anddifferent effect from the channel-guide. Thus, for instance, it isconstructed as a sharp-pointed penetrating-awl, and it has afour-motioned feed which causes its point to describe a rectangularpath.

Referring more particularly to Figs. 2 and 3, the channel-guide glieswith its broad edge against the solid leather under the channellip andmoves back and forth, as indicated by the a; arrows, and merely holdsthe channellip up to and against the thrust of the needle, but thepositive feed-awlf has a com pound motion. Thus before guide 9advancesin Fig. 2 the feed-awl f moves in the direction of its arrow 1and penetrates the solid leather of the channel-lip. Then guide g, Fig.2, moves in the direction of its m arrow, and feed-awl also moves withit in the direction of its arrow 2, and by having its point deeplyembedded into the leather of the channel-lip it positively feeds thesole along. When it reaches the end of the forward movement, (now seeFig. 3,) the feedawl moves outward in the direction of its arrow-3,which takes its point out of the leather and then g moves back in thedirection of its a arrow and at the same time f returns in the directionof its arrow 4. It will thus be seen that while the work is firmly heldup to the shoe-rest, break-bar, and needle by the guide g a verypositive and certain feed is secured by the four-motioned awl-feed. Animportantand distinguishing feature of this part of my invention is thatthe channelguide reciprocates only in the line of feed or in a-planeparallel thereto and does not move sidewise at all, and hence does notat any time leave its bearing against the leather in the channel. Thisis necessary with a feedawl in order to hold the sole while the awl isbeing pulled out of the leather, and, furthermore, by constantly holdingthe shoe up to place it does not allow the stitches to run out towardthe edge of the sole, as they are liable to do in turning the toe withother constructions. These two devices, the awl-feed f and thechannel-guide g, are actuated and controlled in their'respectivemovements by the feed-cam A of the main shaft, whose connectio'ns withthe said parts I will now more particularly describe,

Referring to Figs. 4, 5, and 6, A is an upright arm pivoted at its lowerend upon a stud on the main frame and having at its upper end anadjustable friction-roller a, that plays in a cam-groove a, formed onthe external periphery of the main cam A. To this arm is attached anoscillating and rectilinearly-reciprocating sleeve A having an arm Arunning rearwardly into the machine below the main shaft and having afriction-roller a (see dotted lines, Figs. 5 and 6) playing in acam-groove a in the side of the main camplate A. The arm A of thisoscillating and reciprocating sleeve A is adj ustably fastened to theactuating-arm A through the slotted bracket-piece A, through whose slotthere passes a bolt A, which also passes through a slot in arm A (seeFig. 6) and permits the oscillating and reciprocating sleeve A to beconnected to the arm A at a point'higher or lower or nearer to orfarther from the center of oscillation of said arm, so that a greater-orless throw in rectilinear reciprocation may be given to the sleeve A inhorizontal direction, and as this rectilinear reciprocation of thesleeve is the feed-motion it will be seen that this slotted bracketconnection A causes a longer or shorter feed, for as the cam A revolvesits cam-groove a oscillates arm A and the latter, through this'slottedbracket-piece A ismade to reciprocate the sleeve A in a horizontaldirection. This sleeve A has a downwardly-projecting arm A, Figs. 4and6, which carries the feed-awl f, which, as before described, has notonly a forward-and-backward movement, buta sidewise movement as Well.Thisforward-and-backwardmovement is supplied by the longitudinalreciprocation of the sleeve A as effected by arm A and the cam-groove a,while the sidewise movement is effected by the oscillation of the sleeveA about its axial center aseffected by arm A and the cam-groove a in theside of cam A. Inside the sleeve A there is another sleeve A which has ashoulder a Fig. 5, at one end and a screw-ring a at the other, betweenwhich the sleeve A is held to cause both to have the same longitudinalreciprocation, while allowing sleeve A to oscillate on the sleeve A Thissleeve A is maintained upon a long axial pin A secured at its inner endto the framework of the machine and on which pin the sleeves A Areciprocate. The sleeve A is prevented from rotating or turning withsleeve A by laterally-projecting lugs a a, formed on sleeve A andembracing a guidepin a projecting from the framework of the machineparallel to the long pin A From the inner sleeve A there is adownwardlyprojecting arm A", Fig. 4, which bears the channel-guide g,whose action is describedin connection with Figs. 1, 2, and 3. From thisdescription it will be seen that the channelguide 9 partakes of themotion of sleeve A and has only a back-and-forth motion, while thefeed-awlf partakes of the longitudinal reciprocation of sleeve A andalso its axial oscillation, which gives to said feed-awl both abackward-and-forward movement and a side- Wise movement, forming thefour-motioned feed described in connection with Figs. 2 and 3. Themovements-of the channel-guide g and feed-awl f are simultaneous on thebackward-andrforward stroke, while the camgroove a is (see Fig. 6) sotimed in relation to the other parts as to rock the sleeve A and movethe feed-a'wl sidewise at the ends of its backward-and-forwardmovements.

It may be necessary at times to cause the feed-awl to take a deeper holdin theleather, and for this purpose the awl is adjusted at right anglesto theline of stitching by two setscrews a of, Fig. 6, passing throughthe arm A and bearing from opposite sides against the head of thefeedawl. By looseningone of these screws and tightening the other thepoint of the awl may be thrown farther into or farther out from thechannel-lip of the sole. The head of the feed-awl is slotted and securedby a screw 0. which permits the awl to be raised or lowered. To givethis upand-down adjustment, a screw-stem a is tapped in a lug of arm Aand its enlarged head below swivels in a socket in the top of theawl-headi This screw-stem has holes through it, into which a nail orpointed instrument may be inserted to turn it and adjust the awl head upor down. A similar screw-stem (r Fig. 4, with enlarged head is made toturn in a lug of arm A While its head swivels in a socket in the head ofthe channel-guide g to adjust it vertically in the same way.-

I will now describe the second feature of improvemenhwhich consists in anew combination and arrangement of the breakdown bar for bending theouter edge of the sole down, so as to give the needle full clearance inentering the sole. Referring to Fig. 1, b is this breakdown bar. In myprevious application this breakdown bar had substantially the same shapebut a different movement. In that case it advanced, to bend down theedge of the sole, in a straight horizontal line in the plane of theshoe-sole and in the line of its own longitudinal axis. In my improvedmachine said bar advances and moves downwardly at the same time, movingat an angle to its own longitudinal axis from the position shown indotted lines to the position shown in full lines and causing a pressureupon the edge e of the shoe-sole in the direction of the arrow, whichmakes a more certain and positive bending down of the edge of the solewithout-risk of curling it up at the edge. The means for giving thismotion to the breakdown bar b are best shown in Fig. 7.

C is the actuating-cam, which has a groove 0 on its side in whichtravels a friction-roller c on the end of a lever C,which is fulcrumedon a pin 0 attached to the framework. This lever extends downwardly pastits fulcrum,

is held by spring Q and is adapted to bear against a lug O adjustablyfastened to the shank O of the breakdown bar b This .in the oppositedirection.

shank is entirely disconnected from its operailing-lever and is pressedforwardly by a helical spring 0 one end of which is connected to theshank and the other to the framework, while it is drawn backward by thecontact of lever 0 against the lug C The shank (J of this breakdown baris arranged horizontally, but is pivotallymounted upon the upper ends oftwo swinging arms 0 O swinging radially about pins or axial screws attheir lower ends fastened to the framework, so as to give to thebreakdown bar a parallel motion, cansin g it to move forwardly anddownwardly and rearwardly and upwardly to give the general directionv ofmovement indicated by the arrow in Fig. 1.

To cause the lever O to act sooner or later in its stroke upon thebreakdown bar, the lug 0 may be adjusted closer to or farther from thelever, and for this purpose said lug is slottedlongitudinally and issecured to the shank of the breakdown bar by two screws 0 0 .To limitthe forward projection of the breakdown bar, a stop-screw 0 Figs. 6 and'7, is tapped through an offset at the rear end of its shank and is madeto strike against the stationary frame sooner or later to vary the throwof the breakdown bar. By this. construction it will be seen that thebreakdown bar is not directly connected to its actuating lever, andtherefore does not have an equal and contemporaneous movement therewith,but is enabled to maintain its bearing against the edge of the sole fora greater or less time while the thread is being pulled throughindependently of the motion of the other parts of the machine.

Just below the shank of the breakdown bar is arranged in horizontalposition the shank C of the shoe-rest r, against which latter the shoeis supported while being sewed. This rest is made spring-seated throughthe agency of a helical spring 0 but both this restand the breakdown barare rigidly locked when in their forward positions by a pawl or detent Gwhich engages ratchet-teeth c and c on the shanks of said parts. rangedon a vertical rock-shaft G which has a crank-arm C and stem 0 carrying afriction-roller 0 that bears against the flanged edge a of cam G, whichflanged edge is con- This pawl is arstructed as a cam designed to rockthe shaft O in one direction, while a spring 0 turns it This motion forthrowing the pawl into and out of the ratchetteeth of the shoe-rest andbreakdown bar is timed to correspond with the movement of the coactingparts and is substantially the same as that shown in my previous application.

Referring to Figs. 4, 5, and 8, B is the positive takeup, which consistsof a bar sliding in a housing.B attached to the stationary framework andbearing on its outer end a thread-guide b and on its inner end afriction-roller b, that bears against the outer periphery of anadjustable cam B, which is ad justably secured to the side of thecam-disk B, being formed witha curved slot 12 Fig. 8, through whichthere passes a bolt 12 that enters the cam-disk B and rigidly conneetsthe adj ustable cam B thereto in such a-manner as to permit itsrelationto disk B to be changed to cause the cam to act sooner or later in'therevolution of the cam disk. This positive take-upbar'B carries onitsthread-guide b the thread which slides through the guide and.

passes onto a central hole in the looper-screw B Figs. 1 and-6, andthence to the looper below,which loops it around the needle, asdescribed in my previous case, the 'loop'er beingv made to oscillateaboutits axial center'by the reciprocation of a screw-nut Blongitudinally overits threads by means of leverB as shown in Fig. .7.The take-up bar B isforced outwardly to take up the thread bythe adj ustable cam 13 andis brought back again by a springB, Fig. 8,containedwithin the takeup housing 13 the adjustable cam 13' on the diskB the takerequirements of'the case.

held down by a spring '6 After the thread passes around the'pulleyit'rises again and passes around the groove of a tension-ring B, Fig. 5,and thence to tension-disks R, as described and shown in mypreviouscase; It will thus be seen that the secondtake-up b hangs in aloop or bightof-the thread;

N, Fig. 8, is the needle-actuating arm,which is jointed to the lower.end of an elbow-lever N, whose other end carries afriction-roller n thattraverses a cam-groovein the side of camdisk B, as shown in dotted linesinF-ig. 8. 'lThisneedle-actuating arm N is connected to the oscillatingneedle-carrier n, and isalso connected by a spring n with the slidingbar b of the take-up b so that when the needleaetuating arm N rises todrawback the needle and pull the thread through the work this upwardmovement of the needle-actuating arm will, through spring 01?, lift thetake-up b and relieve the thread of the strain of this take up, allowingthe thread to be pulled through the'WOrk by the needle with much lessstrain, and greatly reducing the liability to break the thread. Thisfeature is especially related to a hooked needle whose function is topull the heavy threadthrough the work from the looper and involvingunusual strain. I do not confine myself to a spring n for thustransmitting-the lifting effect of the needle-arm to this take-up, asvarious other connections may be employed as, for instance, as shown inFig. 9, a link n 'may be used, or, as shown in Fig. 10, a tappet-arm nmay be arranged on the needle-actuatin g arm By varying the position ofT or its lever to strikea lug or pin on the take-11p, j and thustransmit the sam e effect thereto.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is I 1. The combination in a shoe-sewingmachine, of a'curved needle, a feeding device,

means for causing said feed device-to enter the channel in the sole andfeed the work-toward the path of' the needle, and a channel-guidelocated in advance of the feedin g device, and

means for moving said channel-guide back and'forth in the direction ofthe feed of the work in' unison with'the feed device as set forth;

2. In a machine for sewing the uppers to the soles of shoes, thecombination with the needle and its actuating mechanism;ofa-ch'annelguide-arranged upon the opposite side of-the line ofstitching fromthe needle, andafe'eding-awl arranged beside the cliannelguide and'on the same side therewith; the channelguide 'having'only aback-and-forth reciprocating movement parallel to the line offered sothat'it does not leave its bearing in the channel, and the feed awlhavingboth a backand-forth movement and also a sidewise movement andmeans for actuating these parts substantiallyasshown and described.

3. The combination with the channel-guide, and the feed-awl arrangedbeside it; of'areoi procatin g and oscillatin g sleeve carryingthe-feed-awl, two cams one for reciprocating, and the. other foroscillating this sleeve, a concentrio sleeve carrying the channel-guide,and arrangedwithin the first-named sleeve and connectedto it for thesame longitudinal re- .ciprocation, a guide for preventing saidchannel-guide sleeve from oscillating, and arigid central stem or pinfor supporting said sleeves substantially as and for the purposedescribed.

et. The combination with the channel-guide g, and the feed-awl f; of anoscillating and re.- ciprocatin g sleeve having rear arm A bearingafriction-roller, and bottom arm A bearing the feed-awl, a feed cam Ahaving cam-slots on its-periphery and side, an upright arm A withfriction-roller playing in the peripheral slotfor reciprocating thevsleeve, a friction.- rolleron the rear arm A enteringthe side slot foroscillatingthe sleeve, a concentric inner sleeve A bearing thechannel-guide, guidepin a for preventing it from rotating,.and thesupporting pin or stem A substantially as shown and described.

5. The combination of the feed-awl and the reciprocating andoscillatingzsleeve A having downwardl'y-proj eeting arm A provided witha seatfor the feed-awl head, a screwarranged longitudinally to said armand adjusting the feed-awl head 'verticall-yin said arm, andoppositely-arranged transverse screws carried by said arm and adjustingthe feed-awl head laterally thereto substantially as shown anddescribed.

IIO

7 more or less according to the density of the same substantially asshown and described.

7. In a sole-sewing machine, the combination with the needle, the looperand the feeding and guiding devices; of a breakdown bar arranged on thesame side with the needle, and means for imparting to it a movementequal and parallel throughout its length and in a direction at an angleto its own longitudinal axis forwardly and downwardly against the edgeof the shoe substantially as shown and described.

S. In a sole sewing machine, the breakdown bar 19* having a shank, tworadially-moving arms supporting said shank, and means for oscillating itWith a parallel motion substan tially as shown'and described.

9. In asole-sewingmachine, the breakdown bar b having an elongated shankwith lug O radial arms C O sustaining the said shank, a spring a foradvancing said bar, an actuatin g-lever G, and a cam 0 operating uponsaid lever, substantially as shown and described.

10. In a sole'sewing machine, the breakdown bar having an adjustablestop to limit its forward movement, and an adjustable tappet-lug, aspring for moving the bar forward, and an actuating-lever for moving itback, said bar being detached from its actuatinglever and operatedthereby with a tappet action substantially as shown and described.

ADAM H. PRENZEL.

lVitnesses:

H- B. FILBERT, BENJ. A. FILBERT.

